Caroline Wozniacki is a Danish tennis player and is the reigning Australian Open champion. The Dane has consistently been near the top of the WTA rankings throughout her career and has been the number one ranked player as recently as February 2018.

Serena Williams is an American tennis player with over 20 Grand Slam singles titles to her name. Williams’ success on and off the court enabled her to become the highest paid female athlete in sport in both 2016 and 2017.

The world's top twenty men's and women's tennis players attract sponsorship from a wide range of brands from around the world, but the men's game remains more popular with sponsors despite other advances in the game.

Tennis Australia, the national governing body for the sport, has doubled the revenues it has brought in from the sale of media and sponsorship rights to its annual events, led by the Australian Open ‘Grand Slam’ tournament, since it completed the process of taking its rights in-house at the end of 2015.